Universal Nonverbal Intelligence Test (UNIT) by Bruce A. Bracken and R. Steve McCallum      With an entirely nonverbal administration and response format, the UNIT offers a fair, unbiased assessment of intelligence, regardless of the student's language skills, hearing, cultural background, or English proficiency. Its six subtests include Symbolic Memory, Object Memory, Analogic Reasoning, Spatial Memory, Cube Design, and Mazes.      The examiner employs eight relatively universal hand and body gestures to explain tasks to the examinee. The student responds by pointing, making pencil marks, or using manipulatives. The test offers three administration options--Abbreviated, Standard, and Extended Batteries--for screening, diagnostic, and eligibility decisions, respectively. All can be hand- or computer-scored.      UNIT scores predict academic achievement and differentiate among students with mental retardation, learning disabilities, speech/language impairments, or giftedness.